[INFO] crate tomlenv 0.4.1 is already in cache
[INFO] testing tomlenv-0.4.1 against 1.44.0 for beta-1.45-1
[INFO] extracting crate tomlenv 0.4.1 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate tomlenv 0.4.1 on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate tomlenv 0.4.1
[INFO] finished tweaking crates.io crate tomlenv 0.4.1
[INFO] tweaked toml for crates.io crate tomlenv 0.4.1 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] aa55a0cdc2c46a7fee5c2a3e129802a4558a684d8fa7274187fd87538a4216ef
[INFO] running `"docker" "start" "-a" "aa55a0cdc2c46a7fee5c2a3e129802a4558a684d8fa7274187fd87538a4216ef"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.2
[INFO] [stderr]    Compiling proc-macro-error v1.0.2
[INFO] [stderr]    Compiling syn-mid v0.5.0
[INFO] [stderr]    Compiling serde_derive v1.0.111
[INFO] [stderr]    Compiling toml v0.5.6
[INFO] [stderr]    Compiling getset v0.1.1
[INFO] [stderr]    Compiling tomlenv v0.4.1 (/opt/rustwide/workdir)
[INFO] [stderr] warning: lint `redundant_semicolon` has been renamed to `redundant_semicolons`
[INFO] [stderr]    --> src/lib.rs:306:5
[INFO] [stderr]     |
[INFO] [stderr] 306 |     redundant_semicolon,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^ help: use the new name: `redundant_semicolons`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(renamed_and_removed_lints)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]    --> src/lib.rs:266:1
[INFO] [stderr]     |
[INFO] [stderr] 266 | #![feature(crate_visibility_modifier, error_iter)]
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error; 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: could not compile `tomlenv`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "aa55a0cdc2c46a7fee5c2a3e129802a4558a684d8fa7274187fd87538a4216ef"`
[INFO] running `"docker" "rm" "-f" "aa55a0cdc2c46a7fee5c2a3e129802a4558a684d8fa7274187fd87538a4216ef"`
[INFO] [stdout] aa55a0cdc2c46a7fee5c2a3e129802a4558a684d8fa7274187fd87538a4216ef